Confidence votes 5. Well the cleanest bug in the world would most probably be a cockroach but dogs do have the cleanest mouths~!!! (=. 3 people found this useful.
Best Answer: The answer is 2. fault. That is the break in the crust. When the movement occurs, that is an earthquake. a locked discontinuity is a fault, if it moves you have an Earthquake. It is a fault. volcano. thats not my answer.
Crustal Tectonic Plates and their movement. How the Earth's crust is split into large sections called tectonic plates is described. Their movement and effects at plate boundaries are explained e.g. earthquakes, volcanoes, mountain building, ocean ridges/trenches, subduction (part of the rock cycle).